1. Institute of Medical Psychology, Computational Intelligence Research Group, Otto-von-Guericke-University of Magdeburg, Germany
2. Department of Computer Science, Computational Intelligence Research Group, Otto-von-Guericke-University of Magdeburg, Germany
3. Max Planck Institute for Dynamics and Self-Organization, Faculty of Physics, Georg-August University of Goettingen, Bernstein Center for Computational Neuroscience and Bernstein Focus Neurotechnology, Goettingen, Germany